JPH0565587U - Touch-fing type mechanical pencil - Google Patents

Abstract

(57) [Summary] (Correction) [Purpose] A touch-sensitive mechanical pencil that allows the core to be drawn out by a simple operation while maintaining the writing state. [Structure] A finger feed body 10 is housed inside a mouthpiece 2 so as to be movable in the axial direction, and a first chuck set 3 is arranged behind it. The first chuck case 29 is movable in the axial direction, the tactile feed body 10 and the first chuck case 29 can be moved backward together, and the touch finger feed body 10 and the first core fixed chuck 22 can be linked. Make it possible to move forward. The second chuck set 4 is arranged at the rear position of the first chuck set 3, the first chuck case 29 is biased forward between the first chuck set 3 and the second chuck set 4, and the second core A spring 34 is inserted to pull out the fixed chuck 16 to the front side to bring it into an expanded state.

Description

[Detailed description of the device]

[0001]

[Industrial applications]

 With the present invention, when the lead is worn out during writing, the touching finger feed body arranged at the tip of the shaft is gently pulled backward with the fingertip and released while keeping the writing state. The present invention relates to a feeler-feeding type mechanical pencil capable of feeding a required amount of lead.

[0002]

[Prior Art]

 This type of conventional touch-fed mechanical pencil has a knock body at the rear end of the shaft in addition to the finger-feeding body, and the core is a holding chuck arranged inside the fixed core chuck and the finger-feeding body. The core can be drawn out by the finger-feeding body only when it is gripped on the other side. In other cases, for example, when drawing out the second and subsequent cores following the core in writing, or drawing out a completely new core. In this case, it is necessary to press the knock body so that the lead fixing chuck and the holding chuck hold the lead. Also, when the lead is returned to the shaft after writing, the knock body is also pressed to hold the lead. I had to complain that the operation was extremely troublesome because I had to open the. In addition, the conventional finger-feeding type mechanical pencil is incapable of writing when the length of the lead during writing becomes too long to be grasped by the lead fixing chuck. There was a lot of waste because the core had to be discarded.

[0003]

[Problems to be solved by the device]

 Therefore, the present invention is not limited to feeding the lead during writing, but is also used when the lead during writing is worn and the second and subsequent lead that follows it is continuously fed out, or when the lead is held by the lead fixing chuck. Even if you extend a new lead from a state where nothing is present, or if you want to return the protruding lead to the original position and immerse it afterwards, it is possible to do it by only operating the touching finger extension body, and the knocking operation is unnecessary and the operation is simple. In addition to this, it is an object of the present invention to provide an economically advantageous touch-fing type mechanical pencil in which one core can be used without waste.

[0004]

[Means for Solving the Problems]

 In order to achieve the above-mentioned object, the stylus feeding type mechanical pencil of the present invention is configured such that a base 2 is screwed to a front end of a barrel 1 to move a finger feeding body 10 inside the base 2 in an axial direction. It is housed at the same time, and the touching finger operating portion 13 of the touching finger feeding body 10 is exposed to the outside of the mouthpiece 2 to exert a sufficient lead fixing force against the writing pressure and the lead 5 is not pulled out to the front. The first chuck set 3 in which the first lead fixing chuck 22 made possible by a pinch force is housed in the first chuck case 29 is arranged inside the front end of the barrel 1 at the rear position of the finger feed body 10. The first chuck case 29 is movable in the axial direction, and the touching finger feeding body 10 and the first chuck case 29 are moved so that the first chuck case 29 moves backward in conjunction with the backward movement of the touch finger feeding body 10. While touching, the finger feeding body 10 and the first core fixing chuck 22 Is interlocked with the forward movement of the finger-feeding body 10 so that the first lead fixing chuck 22 moves forward and spreads out, and at the rear position of the first chuck set 3, the first lead fixing chuck 22 and The second chuck set 4 including the second core fixing chuck 16 having the same function in the second chuck case 15 is arranged, and the first chuck case 29 is provided between the first chuck set 3 and the second chuck set 4. A spring 34 that urges the second core fixed chuck 16 forward and pulls the second core fixed chuck 16 forward to open the second core fixed chuck 16, and has a smaller elastic force than the spring 34 in the second chuck case 15. It is provided with a retracting spring 17 for retracting the second core fixing chuck 16 to a position for gripping the core 5 only when the first chuck case 29 is retracted, and also in front of the finger feed body 10 inside the mouthpiece 2. At the position, a sufficient lead fixing force is exerted against the writing pressure, and the lead 5 can be passed forward by the lead feeding output of the first lead fixing chuck 22 and the touch finger feeding body 10 moves forward when the touch finger feeding body 10 moves forward. The feeding body 10 is provided with a tip core gripping chuck 39 that projects toward the front of the mouthpiece 2 and expands by abutting against the rear end and pressing.

[0005]

[Action]

 When feeding out the core 5 during writing, when the fingertip operation portion 13 of the touching finger feeding body 10 is pulled lightly backward with the fingertip, it is pushed by the touching finger feeding body 10 and the first chuck case 29 compresses the spring 34. The second core fixing chuck 16 which is retracted and is released from the force of the spring 34 at this time is retracted to a position where the core 5 is gripped by the force of the retracting spring 17, and the core 5 is fixed. When is retracted, the first lead fixing chuck 22 moves to the rear position while sliding with respect to the fixed lead 5 and holds the lead 5. In this state, when the finger is released from the touching finger feeding body 10, the force of the spring 34 moves the first chuck set 3 forward, and at this time, the lead 5 is pushed out by the forward movement amount of the first lead fixing chuck 22. .. Next, when the core 5 being written is worn and the second and subsequent cores 5 following it are continuously fed out, or the core 5 is not gripped by the first core fixing chuck 22, it is completely new. To take out, operate as follows. First, since the second lead fixing chuck 16 is normally pulled forward by the spring 34 to maintain the expanded state, the new lead 5 that naturally falls from the lead storing portion 8 passes through the inside of the second lead fixing chuck 16. The tip of the second core fixing chuck 16 is made to reach immediately after the core gripping portion 40 of the first core fixing chuck 22, and when the finger feeding body 10 is retracted as described above in this state, the second core fixing chuck 16 is slightly retracted. Then, the lead 5 is fixed, and the tip of the lead 5 is inserted into and held by the lead gripping portion 40 of the first lead fixing chuck 22 by retreating the first lead fixing chuck 22. Therefore, in this state, when the finger is released from the touching finger feeding body 10, the lead 5 is fed out by the first lead fixing chuck 22 as in the above. Next, when the finger-feeding body 10 is slightly moved forward with the fingertip, the tip-core gripping chuck 39 is pushed forward by the finger-feeding body 10 and spreads open, and at the same time, the first-core fixing chuck 22 also. Since it is expanded by being pulled by the finger feed body 10 and moving forward, all the chucks are expanded and the core 5 can move freely, and the tip of the core 5 is pressed against the paper surface and lightly pressed. The core 5 can be immersed by returning it. Next, since the tip core gripping chuck 39 has a sufficient core fixing force against the writing pressure, even if the core 5 is consumed to a length that cannot be gripped by the first core fixing chuck 22, as long as it can be fixed by the tip core gripping chuck 39. Writing is possible.

[0006]

【Example】

 Hereinafter, embodiments will be described in detail with reference to the drawings. First, the barrel 1 has a tail plug (not shown) detachably fitted to the rear end (in the drawing, the upper side is the rear side and the lower side is the front side), and the base 2 is screwed to the front end. The first chuck set 3 is housed inside the front end of the barrel 1, the second chuck set 4 is housed in a row in the rear thereof, and one core 5 is arranged behind the rear second chuck set 4. A small hole 6 is formed in the center of the partition wall 7 so that it can pass therethrough, and a partition wall 7 whose rear surface is shaped like a stave is provided. An inner space behind the partition wall 7 serves as a core storage section 8.

As shown in FIG. 2, the mouthpiece 2 has a cutout portion 9 in which a central tubular portion 11 of a finger feed body 10 is housed. The finger-feeding body 10 has a ring-shaped finger-touch operating portion 13 connected to the outer peripheral position of the central tubular portion 11 by an arm piece 12. The arm piece 12 of the touch-feeding body 10 penetrates the notch 9 of the mouthpiece 2, and the touch-finger operating portion 13 is exposed at the outer peripheral portion of the mouthpiece 2. The toe-feeding body 10 is movable in the axial direction (front-back direction) by the arm piece 12 moving along the notch 9 of the mouthpiece 2.

Of the two chuck sets housed in tandem inside the front end of the barrel 1, the second chuck set 4 located at the rear is a second chuck case 15 having a tapered portion 14 on the inner surface of the front end. A second lead fixing chuck 16 housed in the second chuck case 15, a retracting spring 17 for biasing the second lead fixing chuck 16 rearward, and an outer surface portion of the second lead fixing chuck 16. And a ball 19 fitted in the concave portion 18. The second core fixing chuck 16 has a cylindrical portion 20 protruding from the front end thereof, and a locking flange portion 21 provided on the outer surface of the front end of the cylindrical portion 20. The second chuck case 15 is fixed to the barrel 1.

Next, the first chuck set 3 arranged in front of the second chuck set 4 has the same configuration as that of the second chuck set 4, that is, the first chuck case 29 having the tapered portion 28 and the first chuck case 29. , A first core fixing chuck 22, a retracting spring 23, and a ball 25 fitted into a recess 24 on the outer surface of the first core fixing chuck 22, and a cylindrical portion 26 is projected at the front end of the first core fixing chuck 22. The locking flange 27 is provided on the outer surface of the front end of the locking collar 27. The first chuck case 29 is slid in the axial direction with respect to the barrel 1 and abuts against the rear end edge of the base 2 screwed to the front end of the barrel 1 to restrict the forward movement. ing. The front end of the first chuck case 29 comes into contact with the stepped portion 30 provided on the outer surface of the rear end of the central tubular portion 11 of the touch finger feeding body 10 so that when the touch finger feeding body 10 moves backward, It is adapted to be pushed back by the portion 30. The tubular portion 26 provided at the front end of the first core fixing chuck 22 is inserted into the central tubular portion 11 of the finger feeding body 10 from the rear end opening, and the locking collar portion 27 provided at the front end thereof has the central tubular portion. It is adapted to engage with the front surface side of the engaging hook portion 31 provided on the inner surface of the rear end of the portion 11. Therefore, when the toe-feeding body 10 moves forward, the locking brim portion 31 pulls the locking brim portion 27, so that the first core fixing chuck 22 moves forward in an interlocking manner, but when the finger-feeding body 10 moves backward. The first lead fixing chuck 22 and the finger feed body 10 are free from each other.

A relay cylinder 32 is interposed between the first chuck set 3 and the second chuck set 4. The relay cylinder 32 is urged forward by a spring 34 interposed between a step portion 33 provided on the outer surface of the relay cylinder 32 and the front end surface of the second chuck case 15, and its front end surface contacts the rear end surface of the first chuck case 29. Touching. Also, the rear end of the relay tube 32 is inserted into the front end of the second chuck case 15, and the projection 35 provided on the outer surface of the rear end is engaged with the protrusion 36 provided inside the front end of the second chuck case 15. It is locked together. Since the rear end portion of the relay cylinder portion 32 can be inserted into the second chuck case 15, a slit (not shown) is formed at the front end portion of the second chuck case 15 so that the inner diameter can be easily expanded by elastic deformation. ) Is formed. In addition, the front end of the tubular portion 20 of the second core fixing chuck 16 is inserted into the rear end of the relay cylinder 32, and the locking flange 21 is provided on the inner surface of the rear end of the relay cylinder 32. It is engaged with the portion 37. When the front end of the tubular portion 20 of the second core fixing chuck 16 is inserted into the rear end of the relay barrel 32, the tubular portion 20 of the tubular portion 20 is not inserted into the second core fixing chuck 16. Reduce the outer diameter. As the spring 34, one having a stronger elastic force than the retracting spring 17 that biases the second core fixing chuck 16 backward is used. Therefore, the second lead fixing chuck 16 is normally pulled forward by the relay tube 32 to maintain the expanded state and allows the lead 5 to pass freely.

The relay cylinder 32 can be integrated with the first chuck case 29 in the first chuck set 3. However, in such a case, the inner diameter of the portion corresponding to the relay cylinder 32 can be expanded by elastic deformation so that the first core fixing chuck 22 can be inserted into the first chuck case 29. It is necessary to provide such slits.

A tip core gripping chuck 39, which is biased rearward by a retracting spring 38, is mounted inside the mouthpiece 2 screwed to the front end of the barrel 1. The rear end of the tip core gripping chuck 39 and the front end of the finger feed body 10 are normally separated, but when the finger feed body 10 is moved forward, they come into contact with each other and the tip core grip chuck 39 is pushed forward. The core 5 is allowed to pass freely.

FIG. 1 shows a state in which the tip of the core 5 is worn by writing and the core 5 needs to be fed out. From this state, when the finger operation section 13 of the finger feeding body 10 is gently pulled backward with the fingertip, the first chuck case 29 is pushed back by the step portion 30 of the finger feeding body 10, and the relay cylinder 32 is further pushed. Is pushed by the first chuck case 29 and retracts. At this time, the first lead fixing chuck 22 inside the first chuck case 29 is also retracted integrally, but since the lead 5 is fixed by the tip lead gripping chuck 39, the first lead fixing chuck 22 is attached to the lead 5. The wick 5 retreats while sliding, and the lead 5 is relatively pulled out from the first lead fixing chuck 22. When pulling out the lead 5 forward in this way, the first lead fixing chuck 22 can use a force smaller than the lead fixing force of the tip lead gripping chuck 39, but when the lead is pushed backward by the writing pressure. It can exert sufficient core fixing force to withstand it. The same applies to the second core fixing chuck 16 of the second chuck set 4. When the first chuck case 29 is retracted by being pushed by the finger-feeding body 10, the relay cylinder 32 is also pushed and retracted, and the locking hook portion 37 of the relay cylinder 32 is retracted, whereby the second core fixed chuck 16 Also retracted by the force of the retracting spring 17. As shown in FIG. 3, when the second lead fixing chuck 16 retracts by a certain distance (α), it grips and fixes the lead 5, and does not retract further.

Further, when the touching finger feeding body 10 is retracted to the limit as shown in FIG. 4, the first lead fixing chuck 22 holds the lead 5 at the rearward position. In this state, when a finger is released from the finger operation part 13 of the finger feeding body 10, the relay cylinder 32, the first chuck set 3, and the finger feeding body 10 are integrally advanced by the force of the spring 34, The lead 5 gripped by the first lead fixing chuck 22 is fed out by the forward stroke. When the lead 5 is pulled out forward from the second lead fixing chuck 16 as described above, it can be done with a weak force, and therefore the first lead fixing chuck 22 does not hinder the feeding of the lead 5. The tip core gripping chuck 39 also exerts a sufficient core fixing force against the writing pressure, but a small force can be used to pull out the core 5 to the front side. It does not hinder the feeding of the lead 5 by the first lead fixing chuck 22. The first chuck case 29 stops at the position where the front end of the first chuck case 29 contacts the rear end of the mouthpiece 2, and the finger feed body 10 also stops at the position shown in FIG.

As the lead 5 being written is worn out, the lead 5 following it naturally drops from the lead storage portion 8 and the normally open second lead fixing chuck 16 is freed as described above. To the position immediately after the lead gripping portion 40 of the first lead fixing chuck 22, and follows the front lead 5 and advances. In this state, when the finger-feeding body 10 is pulled backward, the core 5 is fixed when the second core fixing chuck 16 retracts by α as described above. The first lead fixing chuck 22 can hold and feed the lead 5. In the case of feeding out the lead 5 completely, as described above, since the tip of the lead 5 reaches the position immediately after the lead gripping portion 40 of the first lead fixing chuck 22 by spontaneous fall, the lead 5 is also fed out by operating the touch finger feeding body 10 in the same manner. It will be possible.

Even when the lead 5 during writing is exhausted and the rear end of the lead 5 moves forward of the first lead fixing chuck 22, the tip lead gripping chuck 39 fixes the lead 5 with a force capable of withstanding the writing pressure. It is possible to write because it exists. That is, it is possible to write the lead 5 up to a length where it cannot be fixed by the tip lead gripping chuck 39.

When a completely new lead 5 is to be quickly projected from the tip core gripping chuck 39 to start writing, or when writing is completed and the tip of the lead 5 protruding from the tip core gripping chuck 39 is to be immersed, As shown in FIG. 5, the touch finger operation unit 13 of the touch finger feeding body 10 may be pushed forward by the fingertip. As described above, since the front end of the touching finger feeding body 10 abuts on the rear end of the tip core gripping chuck 39 and pushes it forward, the tip core gripping chuck 39 advances and expands, and at the same time, the rear side of the touching finger feeding body 10 moves. The first core fixing chuck 22 having the locking brim 27 with which the locking hook 31 at the end engages is pulled forward and expanded. Therefore, since all the chucks are in the expanded state, the newly replenished lead 5 can be naturally dropped to be quickly projected from the tip core gripping chuck 39, and the core 5 protruding from the tip core gripping chuck 39 can be quickly released. It can be immersed by pushing in the tip of the.

[0018]

[Effect of the device]

 The present invention is as described above. Needless to say, it is possible to easily extend the lead during writing by operating the finger-feeding body. Even when the lead is continuously fed, a completely new lead is fed, or when the lead is retracted and retracted after the writing is completed, the operation of pressing the knock body arranged at the rear end of the barrel is required as in the conventional case. In addition to this, there is an effect that it can be easily done only by operating the touching finger feeding body, and in addition to this, since the tip core gripping chuck can write the core until the length becomes too long to grip the core. This has the effect of eliminating waste of the core.

[Brief description of drawings]

FIG. 1 is a partial vertical cross-sectional view showing a state before a lead is drawn out.

FIG. 2 is a perspective view of a mouthpiece and a finger-feeding body.

FIG. 3 is a partial vertical cross-sectional view showing a state in which the finger-feeding body is retracted until the second lead fixing chuck fixes the lead.

FIG. 4 is a partial vertical cross-sectional view showing a state in which the touching finger feeding body is retracted to the limit.

FIG. 5 is a partial vertical cross-sectional view showing a state in which the core protruding from the tip core gripping chuck is pushed back and retracted after the writing is completed.

[Explanation of symbols]

DESCRIPTION OF SYMBOLS 1 Shaft cylinder 2 Base 3 First chuck set 4 Second chuck set 5 Core 6 Small hole 7 Partition wall 8 Core storage 9 Cutout 10 Finger-feeding body 11 Center tube 12 Arm piece 13 Touch finger operation section 14 Taper Part 15 Second chuck case 16 Second core fixing chuck 17 Retracting spring 18 Recess 19 Ball 20 Cylindrical part 21 Locking flange 22 First core fixing chuck 23 Retracting spring 24 Recess 25 Ball 26 Cylindrical 27 Locking flange 28 Tapered Part 29 First chuck case 30 Step part 31 Locking hook part 32 Relay tube 33 Step part 34 Spring 35 Projection part 36 Convex part 37 Locking hook part 38 Retracting spring 39 Tip core gripping chuck 40 Core gripping part

Claims (1)

[Scope of utility model registration request] 1. A base 2 is screwed to the front end of a barrel 1 to accommodate a finger feed body 10 inside the base 2 so as to be movable in the axial direction, and a finger operation of the finger feed body 10. Part 13 to base 2
Of the first core fixing chuck 22 that is exposed to the outside of the body and exerts a sufficient core fixing force against the writing pressure and allows the lead 5 to be pulled out forward with a slight force.
The first chuck set 3 housed inside is arranged at the rear position of the finger feed body 10 inside the front end of the barrel 1, and the first chuck case 29 is axially movable to allow the finger feed body to move. 10 and the first chuck case 29, the finger feed body 1
The first chuck case 29 abuts so as to retreat in conjunction with the retraction of 0, and the first finger fixing body 10 and the first lead fixing chuck 22 are linked with the forward movement of the finger feeding body 10 to fix the first lead. Lock the chuck 22 so that it moves forward and expands,
Further, at the rear position of the first chuck set 3, the second core fixing chuck 1 having the same function as the first core fixing chuck 22 is provided.
The second chuck set 4 provided with 6 in the second chuck case 15 is arranged to urge the first chuck case 29 forward between the first chuck set 3 and the second chuck set 4 and to move the second core. A spring 34 for inserting the fixed chuck 16 to the front side to expand the fixed chuck 16 is provided, and when the elastic force of the second chuck case 15 is smaller than that of the spring 34 and the first chuck case 29 is retracted. Only the second core fixing chuck 16 is provided with a retracting spring 17 for retracting it to a position for gripping the core 5, and the front position of the finger feeding body 10 inside the mouthpiece 2 has a sufficient core fixing force against writing pressure. In addition to the above, it is possible to pass the lead 5 forward by the lead feeding output of the first lead fixing chuck 22, and when the touching finger feeding body 10 advances, the touching finger feeding body 10 contacts and presses the rear end. Yo Finger touch feeding formula pencil characterized by comprising a tip lead gripping chuck 39 to be widened to project forwardly of the base 2.